I like those supposed "Army" sgian dubhs that are found sometimes. I think Avance has one on it's website. They can have various crests on the handle and it also has various tools tucked inside on hinges like a Swiss Army knife.

All the vendors claim that it is modeled on ones used during th Crimean War but I haven't seen any actual historical proof of that. Could be marketing, could be history? Who knows. I don't care I still like them.

Here's a pic from one of Avance's eBay auctions: